html,body,.main {
    height: 100%;
}
ul {
    list-style: none;
}
a {
    text-decoration: none;
    color: black;
}
#goHome{
    float: right;
}
.main {
    display: flex;
    flex-direction: column;
    // z-index: 50;
    .topbar {
        width: 100%;
        height: 50px;
        // opacity: 0.5;
        padding-left: 20px;
        // background-color: whitesmoke;
        color: black;
        position: fixed;
        z-index: 50;
        top: 0;
        left: 0;
        min-width: 400px;
        #productService,#pressCenter,#exit{
            font-size: 16px;
            margin-left: 15px;
        }
    }
    .box {
        flex: 1;
        // padding-top: 50px;
    }
}